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authorAhmad Fatoum <a.fatoum@pengutronix.de>2019-08-09 14:29:43 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-08-12 09:07:52 +0200
commit909934e3a76d665b55565e4f87b1a10c8a3e4b0e (patch)
tree4b6b99da1a2b3db7640e437379da874c24ca6c67 /Documentation
parent0b56bacfed66a074b17f9c402cc769590d033d9b (diff)
downloadbarebox-909934e3a76d665b55565e4f87b1a10c8a3e4b0e.tar.gz
Documentation: add imx6ull-evk boot mode documentation
The compute module on the 6ULL-EVK has two DIP switches for choosing the boot mode. Instead of looking them up in the vendor documentation[1] each time, document them here. [1]: https://media.digikey.com/pdf/Data%20Sheets/Freescale%20Semi/i.MX_6UL_EVK_QSG.pdf Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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+NXP i.MX6ULL EVK Evaluation Board
+=================================
+
+Compute module comes with:
+
+* 512MiB of DDR3L SDRAM
+* 256 MB Quad SPI Flash
+
+
+Boot Configuration
+==================
+
+The NXP i.MX6ULL EVK Evaluation Board has two switches responsible for
+configuring bootsource/boot mode:
+
+ * SW602 for selecting appropriate BOOT_MODE
+ * SW601 for selecting appropriate boot medium
+
+In order to select internal boot set SW602 as follows::
+
+ +-----+
+ | |
+ | O | | <--- on = high level
+ | | | |
+ | | O | <--- off = low level
+ | |
+ | 1 2 |
+ +-----+
+
+Bootsource is the QSPI::
+
+ +---------+
+ | |
+ | | | | | |
+ | | | | | | <---- QSPI
+ | O O O O |
+ | |
+ | 1 2 3 4 |
+ +---------+
+
+Bootsource is the MicroSD::
+
+ +---------+
+ | |
+ | | | O | |
+ | | | | | | <---- MicroSD
+ | O O | O |
+ | |
+ | 1 2 3 4 |
+ +---------+
+
+
+Serial boot SW602 setting needed for ``imx-usb-loader`` is as follows::
+
+ +-----+
+ | |
+ | | O | <--- on = high level
+ | | | |
+ | O | | <--- off = low level
+ | |
+ | 1 2 |
+ +-----+